a.Person walks 10 km (E) one day and 5 km (E) next day. What is the net resultan
ID: 1865227 • Letter: A
Question
a.Person walks 10 km (E) one day and 5 km (E) next day. What is the net resultant? Specify magnitude and direction.
2. Person walks 10 km (E) one day and 5 km (W) next day. What is the net resultant? Specify magnitude and direction.
3. A man walked 10 m north, then 5 m south. What distance did he walk? What is his final displacement?
4. A mail carrier leaves the post office and drives 22 km in a northerly direction. She then drives in direction 60o south of east for 47 km. What is her displacement from the post office? Specify magnitude and direction. Provide algebraic (by vector components) and graphical calculations (by using cosine law) to your solution.
5. An airplane trip involves three legs, with two stopovers. The first leg is due east for 620 km, the second leg is southeast for 440 km and the third leg is at 530 south of west, for 550 km. What is the plane’s displacement?
An object is moving in a straight line with a constant velocity of 5 m/s in the west direction. How far will it have moved after 3 minutes. What is the object’s acceleration?
8. An object travels east with a velocity of 10 m/s. It accelerates at a rate of 2m/s2 for 100 s. What is the velocity of the object after 100 s?
9. An object has an initial velocity of 10 m/s north and then speeds up to 30 m/s in the same direction in 4 s. What is the acceleration of the object?
10. An object accelerates from rest to a speed of 125 m/s over a distance of 1000 m. What is the acceleration of the object and how long did it take for the object to reach that velocity?
Explanation / Answer
1) Resultant displacement = 10 km + 5km = 15 km E
2) Resultant displacement = 10 km - 5km = 5 km E
3) Distance walked = 10m + 5m = 15 m
displacement = 10m - 5m = 5m north
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